YEAR CORRS RBAR SDEV SERR EPS CORES 1920. 105. 0.5407 0.2572 0.0251 0.9552 18.10 1930. 171. 0.6132 0.1487 0.0114 0.9693 19.95 1940. 190. 0.6053 0.1300 0.0094 0.9684 20.00 1950. 190. 0.5691 0.1626 0.0118 0.9635 20.00 1960. 190. 0.5905 0.1381 0.0100 0.9665 20.00 1970. 190. 0.4907 0.2538 0.0184 0.9507 20.00 1980. 190. 0.4867 0.2259 0.0164 0.9499 20.00